Remove character from string using javascript

Question

i have comma separated string like

var test = 1,3,4,5,6,

i want to remove particular character from this string using java script

can a

Answer 1

var test = '1,3,4,5,6';​​

//to remove character
document.write(test.replace(/,/g, '')); 

//to remove number
function removeNum(string, val){
   var arr = string.split(',');
   for(var i in arr){
      if(arr[i] == val){
         arr.splice(i, 1);
         i--;
      }
  }            
 return arr.join(',');
}

var str = removeNum(test,3);    
document.write(str); // output 1,4,5,6